Authentication email has already been sent, please check your email box: and activate it as soon as possible.
You can login to My Profile and manage your email alerts.
If you haven’t received the email, please:
|
|
There are 74 papers published in subject: > since this site started. |
Select Subject |
Select/Unselect all | For Selected Papers |
Saved Papers
Please enter a name for this paper to be shown in your personalized Saved Papers list
|
1. Analysis and Design of Two-Stage 48V VRM Based on Real-Time Current Control for FSBB-LLC | |||
ZHANG Xiangjun,TANG Weiming,WEN Zhaoliang,GUAN Yueshi,WANG Yijie,Xu Dianguo | |||
Dynamic and Electronic Engineering 26 April 2023 | |||
Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
Abstract:With the rapid development of information technology such as AI and cloud computing, the energy consumption of data centers continues to increase. This has led to a transition of the power supply bus voltage from 12V to 48V. The research on the new generation of 48V to 1V converter is of great significance for reducing energy consumption, reducing bus volume, and improving the power supply efficiency of CPUs and GPUs in data centers. In this context, this paper designs a two-stage 48V voltage regulation module that combines a four-switch buck-boost converter and an LLC converter for the 48V bus server architecture. A real-time current control method is proposed for the FSBB converter to achieve zero-voltage switching of switching tubes within the full load range, and smooth switching between boosting and bucking modes. Finally, a 200W experimental prototype was built. | |||
TO cite this article:ZHANG Xiangjun,TANG Weiming,WEN Zhaoliang, et al. Analysis and Design of Two-Stage 48V VRM Based on Real-Time Current Control for FSBB-LLC[OL].[26 April 2023] http://en.paper.edu.cn/en_releasepaper/content/4760557 |
2. Model Predictive Control Strategy with Fixed Switching Frequency for Three Phase Four Leg Voltage Source Inverter | |||
HE Xiaoyong,YANG Wei | |||
Dynamic and Electronic Engineering 23 April 2023 | |||
Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
Abstract:Three phase four leg voltage source inverter (3P4L VSI) has the ability to carry unbalance and nonlinear loads, which makes it suitable to operate as distributed generator under stand-alone circumstance. However, the added neutral leg at the same time increases the complexity of the control process so that the computation burden becomes inevitably heavier. Model predictive control strategy has been proven robust to control four leg inverters, to solve the existing drawback of variable switching frequency which leads to possible instability, as well as to decrease the controller computation burden, this paper has proposed a strategy combined an effective modulation state with an optimized model predictive control method based on the mathematic model of the inverter. The high performance with fixed switching frequency and higher computation efficiency of the proposed strategy is validated by both simulation and experimental results. | |||
TO cite this article:HE Xiaoyong,YANG Wei. Model Predictive Control Strategy with Fixed Switching Frequency for Three Phase Four Leg Voltage Source Inverter[OL].[23 April 2023] http://en.paper.edu.cn/en_releasepaper/content/4760516 |
3. Analysis of electromagnetic characteristics of five-phase induction motor before and after phase loss | |||
LIU Yuwei,SUN Peng,WANG Jiguang,SHEN Guiyue,AI Mengmeng | |||
Dynamic and Electronic Engineering 01 November 2021 | |||
Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
Abstract:Compared with the traditional three-phase induction motor, multiphase induction motor not only has the characteristics of high efficiency and high power density, but also has the advantages of small torque ripple and strong anti-interference. Therefore, it has been paid great attention in the application of electric ship propulsion, aircraft drive, locomotive traction and high-power industry. In this paper, a 15kw five-phase induction motor is taken as the research object. Based on Maxwell electromagnetic field theory, the two-dimensional electromagnetic transient field model of five-phase induction motor is established by using finite element simulation software, and solving the problem of the magnetic density, torque and electromagnetic loss of the motor under different working conditions. | |||
TO cite this article:LIU Yuwei,SUN Peng,WANG Jiguang, et al. Analysis of electromagnetic characteristics of five-phase induction motor before and after phase loss[OL].[ 1 November 2021] http://en.paper.edu.cn/en_releasepaper/content/4755668 |
4. Study on the Resonant Instability of LCL-TYPE Photovoltaic Farms | |||
RAN Lize,WANG Jianze | |||
Dynamic and Electronic Engineering 01 June 2020 | |||
Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
Abstract:For the grid side current fed LCL inverter based photovoltaic farms, the mechanism of high-frequency resonance is revealed in this paper: the photovoltaic power station is equal to the circuit in which the resistance is connected in series with the capacitor in a certain frequency region, and it will be possible to construct an equivalent RLC resonant circuit with inductive grid impedance to produce an unstable or weak damping circuit resonance, represented as a high frequency resonant component emerging in the grid side current of LCL inverter. In addition, this paper theoretically verifies the RLC equivalent circuit and analyzes its excitation conditions. Furtherly, the influence of the control function of the LCL inverter on the damping characteristics of the equivalent resonant circuit is analyzed. Finally, the correctness of the analysis is verified by simulation experiments. | |||
TO cite this article:RAN Lize,WANG Jianze. Study on the Resonant Instability of LCL-TYPE Photovoltaic Farms[OL].[ 1 June 2020] http://en.paper.edu.cn/en_releasepaper/content/4752227 |
5. Research on Control Strategy of SCESS-DFIG Grid-side Converter Based on Power-Energy Balance | |||
Long Haotian,Sun Dongyang,Sun Li | |||
Dynamic and Electronic Engineering 16 April 2020 | |||
Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
Abstract:In this paper, the problem of DC bus capacitance voltage fluctuation caused by multiple converters is studied. The main function of super capacitor energy storage device and DC-DC converter is to provide inertia response power, and its power characteristic is step load. Due to changes in the DC load characteristics of the gird side converter, the balance and stability of the original system will also change. Because the complex topology and system composition of wind storage integrated doubly fed wind turbine, the conventional control strategy can not be used to improve the dynamic response speed. Therefore, this paper designs a control strategy which is suitable for the rapid recovery of DC bus capacitance voltage of wind storage integrated doubly fed wind turbine. The theory proposed in this paper is verified by simulation model and experiment. | |||
TO cite this article:Long Haotian,Sun Dongyang,Sun Li. Research on Control Strategy of SCESS-DFIG Grid-side Converter Based on Power-Energy Balance[OL].[16 April 2020] http://en.paper.edu.cn/en_releasepaper/content/4751504 |
6. A Hybrid Channel Allocation Method for Power Line Communication | |||
ZOU Deqin,LIU Xiaosheng | |||
Dynamic and Electronic Engineering 26 March 2018 | |||
Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
Abstract:Power line communication uses the power line of power system as a communication medium, so its convenience is unparalleled. Meanwhile, it is considered to be one of the best communication technologies in smart grid. This technology must be more and more widely used in the future. However, the whole network of PLC shares one channel, leading to shortage of channel resources. The time variation of PLC system also contributes to reduce channel utilization. In this paper, a hybrid channel allocation method based on PRIME will be proposed. It combines the strength of TDMA and CSMA/CA, which can significantly avoid collision, increase throughput and decrease transmission delay. It is emphasized on TDMA, and CSMA/CA is auxiliary. The idea of time-sharing transmission is used in the method. The results of simulation will show that the method is feasible and effective. The method is of great significance to improve overall performance of PLC. | |||
TO cite this article:ZOU Deqin,LIU Xiaosheng. A Hybrid Channel Allocation Method for Power Line Communication[OL].[26 March 2018] http://en.paper.edu.cn/en_releasepaper/content/4743967 |
7. Transient Stability Assessment Using Individual Machine Equal Area Criterion PART II: Stability Margin | |||
WANG Songyan,YU Jilai,ZHANG Wei | |||
Dynamic and Electronic Engineering 10 July 2017 | |||
Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
Abstract:In the second part of this two-paper series, the stability margin of a critical machine and that of the system are first proposed, and then the concept of non-global stability margin is illustrated. Based on the crucial statuses of the leading unstable critical machine and the most severely disturbed critical machine, the critical stability of the system from the perspective of an individual machine is analyzed. In the end of this paper, comparisons between the proposed method and classic global methods are demonstrated. | |||
TO cite this article:WANG Songyan,YU Jilai,ZHANG Wei. Transient Stability Assessment Using Individual Machine Equal Area Criterion PART II: Stability Margin[OL].[10 July 2017] http://en.paper.edu.cn/en_releasepaper/content/4738528 |
8. Power System Transient Stability Assessment Using Couple Machines Method | |||
WANG Songyan,YU Jilai,ZHANG Wei | |||
Dynamic and Electronic Engineering 07 July 2017 | |||
Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
Abstract:Analyzing the stability of the power system by using a few machines is promising for transient stability assessment. A hybrid direct-time-domain method that is fully based on the thinking of partial energy function is proposed in this paper. During post-fault period, a pair of machines with high rotor speed difference is defined as couple machines, and the stability analysis of the system is transformed into that of several pairs of couple machines. Based on the prediction of power-angle curve of couple machines within a sampling window after fault clearing, the proposed method avoids the definition of Center of Inertia (COI) and it can also evaluate the stability margin of the couple machines by using the predicted power-angle curve. Simulation results demonstrate its effectiveness in transient stability assessment. | |||
TO cite this article:WANG Songyan,YU Jilai,ZHANG Wei. Power System Transient Stability Assessment Using Couple Machines Method[OL].[ 7 July 2017] http://en.paper.edu.cn/en_releasepaper/content/4738531 |
9. Transient Stability Assessment Using Individual Machine Equal Area Criterion PART I: Unity Principle | |||
Wang Songyan,Yu Jilai,Zhang Wei | |||
Dynamic and Electronic Engineering 07 July 2017 | |||
Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
Abstract:Analyzing system trajectory from the perspective of individual machines provides a non-global angle to analyze the transient stability of power systems. This two-paper series propose a direct-time-domain method that is based on the individual-machine equal area criterion. In the first paper, by examining the mapping between the trajectory and power-vs-angle curve of an individual machine, the stability property to characterize a critical machine is clarified. The mapping between the system trajectory and individual-machine equal area criterion is established. Furthermore, a unity principle between the individual-machine stability and system stability is proposed. It is proved that the instability of the system can be confirmed by finding any one unstable critical machine, thence, the transient stability of a multimachine system can be monitored non-globally in online transient stability assessment. | |||
TO cite this article:Wang Songyan,Yu Jilai,Zhang Wei. Transient Stability Assessment Using Individual Machine Equal Area Criterion PART I: Unity Principle[OL].[ 7 July 2017] http://en.paper.edu.cn/en_releasepaper/content/4738525 |
10. Stability and Control Analysis of Doubly Fed Induction Generator Wind Turbine System | |||
Ghulam Sarwar Kaloi,WANG Jie,MI Xiao,Mazhar H Baloch,Sohaib Tahir | |||
Dynamic and Electronic Engineering 31 May 2017 | |||
Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
Abstract:As wind energy production increases, reliability and fault-tolerant operation capability of wind energy systems are becoming more important. The dynamic system becomes unstable due to uncertainty of wind speed circumstances. Therefore, a complete dynamic wind-generator modeling is carried out through the field oriented techniques, which plays a significant role in power system stability and control. In order to get the nonlinear model of DFIG, the grid system in the dq-synchronous reference frame is connected with DFIG based wind turbine in this paper. In this article, the Proportional integrated controller has proposed to reduce the oscillation of DFIG and stabilize the wind turbine system. The obtained results indicated that applying this approach could significantly improve DFIG performance under transient faults circumstances, also oscillations on the produced active power, rotor speed and stator current magnitude were significantly mitigated. | |||
TO cite this article:Ghulam Sarwar Kaloi,WANG Jie,MI Xiao, et al. Stability and Control Analysis of Doubly Fed Induction Generator Wind Turbine System[OL].[31 May 2017] http://en.paper.edu.cn/en_releasepaper/content/4734485 |
Select/Unselect all | For Selected Papers |
Saved Papers
Please enter a name for this paper to be shown in your personalized Saved Papers list
|
|
About Sciencepaper Online | Privacy Policy | Terms & Conditions | Contact Us
© 2003-2012 Sciencepaper Online. unless otherwise stated